皮皮学，免费搜题
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【单选题】
构成教育活动的两个最基本的要素是:A.
教师和学生
B.
教师和教科书
C.
学生和教科书
D.
教学内容和手段
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
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A.
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B.
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